oracle中是否有except函数: select * from a except select * from b

除外：

oracle没有except这个关键字，这个关键字属于sqlserver

，在oracle里，他叫minus，与except是一个意思。

select  a.code OrgId, b.code AppId from NSTM_ORGANIZATION a left join NSTM_SYSTEM b on a.id=b.org_id where a.code='01' and b.code<>'HIP0104'
minus
select a.code OrgId, b.code AppId from NSTM_ORGANIZATION a left join NSTM_SYSTEM b on a.id=b.org_id where b.id='3'